I moved a mail server from one location to another and am running into failure and delay issues. The new location has a different ip address which i assigned to the A record mail. on their public dns server. when i do a mx record lookup or a reverse dns lookup it all tests fine.
this is one message i am getting:
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<mydomain.net #5.7.1 smtp;550 5.7.1 Requested action not taken: message refused>
this user has had no problem sending to him in the past.
I also am getting delay issues from a different user